a = '{{ fileBasename }}'
b = 'mmcv_study/Config/{{ fileBasenameNoExtension }}'
c = '{{ fileExtname }}'
d = '{{ fileDirname }}'
f = dict(b1=0.3, b2=None, b3=0.1)

"""
>>> from mmcv import Config
>>> cfg = Config.fromfile('config_a.py')
>>> cfg
Config (path: config_a.py): {'a': 'config_a.py', 'b': 'mmcv_study/Config/config_a', 'c': '.py', 'd': '/sdb/zzhu/open_code/Pedestron/mmcv_study/Config', 'f': {'b1': 0.3, 'b2': None, 'b3': 0.1}}
"""